1. Soil parameters are key factors to predict metal bioavailability to snails based on chemical extractant data
- Author
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Renaud Scheifler, A. de Vaufleury, Michael Coeurdassier, Benjamin Pauget, Frédéric Gimbert, Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)
- Subjects
LUMBRICUS-RUBELLUS ,MESH: Hydrogen-Ion Concentration ,PH ,MESH : Biological Availability ,Snails ,[ SDV.TOX.ECO ] Life Sciences [q-bio]/Toxicology/Ecotoxicology ,010501 environmental sciences ,MESH: Zinc ,01 natural sciences ,MESH : Soil Pollutants ,Soil ,Soil Pollutants ,MESH: Animals ,MESH: Snails ,MESH : Environmental Monitoring ,Assimilation flux ,Waste Management and Disposal ,MESH : Cadmium ,Risk assessment ,MESH: Biological Availability ,chemistry.chemical_classification ,Cadmium ,Land snail ,Soil chemistry ,04 agricultural and veterinary sciences ,Environmental exposure ,CONTAMINATED SOILS ,MESH: Chemistry Techniques, Analytical ,Hydrogen-Ion Concentration ,Pollution ,6. Clean water ,ORGANIC-MATTER ,Zinc ,Metals ,Environmental chemistry ,Aluminum Silicates ,[SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology ,MESH : Edetic Acid ,MESH : Lead ,MESH: Environmental Monitoring ,MESH: Lead ,Environmental Monitoring ,MESH : Aluminum Silicates ,Environmental Engineering ,Soil test ,MESH: Edetic Acid ,MESH: Environmental Exposure ,MESH: Cadmium ,Biological Availability ,chemistry.chemical_element ,HELIX-ASPERSA ,Chemistry Techniques, Analytical ,MESH: Soil ,HEAVY-METALS ,MESH : Hydrogen-Ion Concentration ,MESH : Soil ,Animals ,Environmental Chemistry ,Organic matter ,Chemical method ,Edetic Acid ,0105 earth and related environmental sciences ,EARTHWORMS ,MESH: Soil Pollutants ,MESH: Metals ,MESH : Metals ,MESH : Zinc ,Environmental Exposure ,MESH : Chemistry Techniques, Analytical ,Bioavailability ,Transfer ,Kinetics ,DERMAL UPTAKE ,Lead ,chemistry ,MESH : Snails ,13. Climate action ,Soil water ,MESH: Aluminum Silicates ,040103 agronomy & agriculture ,Clay ,0401 agriculture, forestry, and fisheries ,DUTCH FIELD SOILS ,MESH : Animals ,MESH : Environmental Exposure - Abstract
International audience; Although soil characteristics modulate metal mobility and bioavailability to organisms, they are often ignored in the risk assessment of metal transfer. This paper aims to determine the ability of chemical methods to assess and predict cadmium (Cd), lead (Pb) and zinc (Zn) environmental bioavailability to the land snail Cantareus aspersus. Snails were exposed in the laboratory for 28 days to 17 soils from around a former smelter. The soils were selected for their range of pH, organic matter, clay content, and Cd, Pb and Zn concentrations. The influence of soil properties on environmental availability (estimated using HF-HClO(4), EDTA, CaCl(2), NH(4)NO(3), NaNO(3), free ion activity and total dissolved metal concentration in soil solution) and on environmental bioavailability (modelled using accumulation kinetics) was identified. Among the seven chemical methods, only the EDTA and the total soil concentration can be used to assess Cd and Pb environmental bioavailability to snails (r²(adj)=0.67 and 0.77, respectively). For Zn, none of the chemical methods were suitable. Taking into account the influence of the soil characteristics (pH and CEC) allows a better prediction of Cd and Pb environmental bioavailability (r²(adj)=0.82 and 0.83, respectively). Even though alone none of the chemical methods tested could assess Zn environmental bioavailability to snails, the addition of pH, iron and aluminium oxides allowed the variation of assimilation fluxes to be predicted. A conceptual and practical method to use soil characteristics for risk assessment is proposed based on these results. We conclude that as yet there is no universal chemical method to predict metal environmental bioavailability to snails, and that the soil factors having the greatest impact depend on the metal considered.
- Published
- 2012